{“lastseen”:””,”description”:”A vulnerability in the RADIUS setting Reject RADIUS requests from clients with repeated failures on Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause Cisco ISE to restart unexpectedly.\\r\\n\\r\\nThis vulnerability is due to a logic error when processing a RADIUS access request for a MAC address that is already a rejected endpoint. An attacker could exploit this vulnerability by sending a specific sequence of multiple crafted RADIUS access request messages to Cisco ISE. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when Cisco ISE restarts.”,”published”:”2025-11-05T16:31:05.000Z”,”modified”:”2025-11-05T20:07:12.870Z”,”type”:”cve”,”title”:”Cisco Identity Services Engine Radius Suppression Denial of Service Vulnerability”,”source”:”cisco”,”references”:”https:\/\/sec.cloudapps.cisco.com\/security\/center\/content\/CiscoSecurityAdvisory\/cisco-sa-ise-radsupress-dos-8YF3JThh”,”id”:”CVE-2025-20343″,”bulletinFamily”:””,”cwe”:null,”cvelist”:null,”sourceData”:”Cisco Cisco Identity Services Engine Software 3.4.0\\nCisco Cisco Identity Services Engine Software 3.4 Patch 1\\nCisco Cisco Identity Services Engine Software 3.4 Patch 2\\nCisco Cisco Identity Services Engine Software 3.4 Patch 3″,”sourceHref”:””,”cvss”:{“score”:8.6,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:L\/PR:N\/UI:N\/S:C\/C:N\/I:N\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Cisco Identity Services Engine Software”,”version”:”3.4.0, 3.4 Patch 1, 3.4 Patch 2, 3.4 Patch 3″,”vendor”:”Cisco”,”ai_description”:”Denial of Service (DoS) vulnerability in Cisco Identity Services Engine (ISE) due to a logic error when processing RADIUS access requests, allowing an unauthenticated attacker to cause the system to restart unexpectedly.”,”ai_severity”:”High”,”ai_vendor”:”Cisco”,”ai_product”:”Cisco Identity Services Engine (ISE)”,”ai_version”:”3.4.0, 3.4 Patch 1, 3.4 Patch 2, 3.4 Patch 3″,”ai_score”:8.6}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”A vulnerability in the RADIUS setting Reject RADIUS requests from clients with repeated failures on Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,81,12,15,13,7,11,5],"class_list":["post-24932","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-86","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n